TW201816460A - Micro imaging system, imaging apparatus and electronic device - Google Patents

Abstract

A micro imaging system includes, from an object side to an image side: a first lens element with negative refractive power, a second lens element with positive refractive power, and a third lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof, wherein the micro imaging system has a total of three lens elements. With specific conditions being satisfied, the structures can be strengthened such that the resistance of the lens to stress can be increased to avoid a deformation of lens due to external forces or environmental factors and thus a better environmental compatibility can be obtained to meet requirements in various applications.

Description

   Micro image capturing system, image capturing device and electronic device   

The invention relates to a miniature imaging system and an imaging device, and more particularly, to a miniature imaging system and an imaging device applicable to an electronic device.

With the increasing application of photography modules, it is an important trend for the future development to use lenses to meet various technological requirements. In addition, the rapid evolution of medical technology has made the lens an indispensable and important component in assisting doctors in diagnosis and treatment, especially in precision instruments or living organisms with limited space, and the ability to adapt to various environments. In addition, in order to meet the application needs in different fields, the system has been developed with different characteristics of the lens system, its application scope includes: smart electronics, medical equipment, precision instruments, automotive devices, identification systems, entertainment devices, sports devices and home intelligence Auxiliary systems, etc.

Traditional wide-angle lenses often use spherical glass lenses, which makes it difficult to reduce the size of the lens and it is difficult to achieve the purpose of miniaturization. At present, the high-quality micro-imaging systems on the market have insufficient shooting angles to capture a wide range of images, so the conventional optical system can no longer meet the current trend of technological development.

The invention provides a miniature image acquisition system, which sequentially includes: a first lens having a negative refractive power; a second lens having a positive refractive power; and a third lens having a negative refractive power and an object side thereof. It is concave at the near optical axis; among them, the total number of lenses of the micro imaging system is three, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2. The distance between the two lenses on the optical axis is T12, the focal length of the micro-imaging system is f, the radius of curvature of the object side curvature of the third lens is R5, and the radius of curvature of the image side of the third lens is R6, which satisfies the following relationship: 0.10 < CT2 / CT1 <1.80; 0.45 <T12 / f <5.0; | R5 / R6 | <0.70.

The present invention further provides a miniature image capturing system, which sequentially includes: a first lens; a second lens having a positive refractive power; and a third lens having a negative refractive power in order from the object side to the image side. Is a concave surface; of which, the total number of lenses of the micro imaging system is three; the thickness of the first lens on the optical axis is CT1; the thickness of the second lens on the optical axis is CT2; the focal length of the first lens is f1; The focal length of the two lenses is f2. The total distance between the two adjacent lenses in the miniature imaging system on the optical axis is ΣAT. The total lens thicknesses of the first lens, the second lens, and the third lens on the optical axis are combined. For ΣCT, the system satisfies the following relations: 0.10 <CT2 / CT1 <1.10; -1.30 <f2 / f1 <0.10; 0.20 <ΣAT / ΣCT <0.95.

The present invention further provides a miniature imaging system, which sequentially includes: a first lens; a second lens having a positive refractive power; and a third lens having a negative refractive power in order from the object side to the image side; The total number of lenses is three. The thickness of the first lens on the optical axis is CT1. The thickness of the second lens on the optical axis is CT2. The distance between the first lens and the second lens on the optical axis is T12. The distance between the object side of the lens and the imaging plane on the optical axis is TL, the focal length of the miniature imaging system is f, the radius of curvature of the second lens object side is R3, and the radius of curvature of the second lens image side is R4, which satisfies the following relationship Formula: 0.10 <CT2 / CT1 <2.50; 0.10 <T12 / CT1 <3.80; 3.80 <TL / f <10.0; 0 <(R3-R4) / (R3 + R4) <3.0.

The invention further provides an image capturing device, which includes the aforementioned micro image capturing system and an electronic photosensitive element.

The present invention also provides an electronic device including the aforementioned image capturing device.

In the present invention, the first lens is designed to have a negative refractive power, which is favorable for forming a negative focus structure to meet a larger angle of image capture range. The second lens is designed to have a positive refractive power, which can provide the main system Convergence ability to balance the aberrations generated by the first lens, while meeting the needs of wide-angle and miniaturization; designing the third lens with negative refractive power can help control the back focus of the system to avoid Petzval field curvature (Petzval field curvature) field) overcorrection; the object side of the third lens can be concave at the near-light axis, which can help reduce the angle of light incident on the lens surface to reduce the probability of total reflection.

When CT2 / CT1 meets the conditions, it can strengthen the structural characteristics and improve the compression resistance of the lens to avoid lens deformation due to external forces or environmental factors, and then have stronger environmental adaptability for use in various application needs.

When T12 / f satisfies the conditions, the distance between the first lens and the second lens can be effectively controlled to avoid too much space resulting in wasted space or too small distances that affect the viewing angle.

When | R5 / R6 | satisfies the conditions, the curvature configuration of the third lens surface can be effectively balanced to achieve a balance between the field angle and the total length.

When f2 / f1 satisfies the above conditions, it can effectively balance the configuration of the refractive power of the lens, so as to have the characteristics of wide viewing angle and miniaturization at the same time.

When ΣAT / ΣCT satisfies the conditions, the system space can be effectively used to meet the miniaturization demand.

When T12 / CT1 meets the conditions, it can effectively improve the space efficiency of the lens to achieve the purpose of miniaturization.

When TL / f satisfies the conditions, it can help to form the wide-angle characteristic of the system, and can reduce the amount of difference caused by the shift of light in different wavelength bands on the optical axis.

When (R3-R4) / (R3 + R4) satisfies the conditions, the lens shape is effectively controlled, so that the position of the main point of the system is more conducive to forming a wide-angle system.

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100‧‧‧ aperture

110, 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110‧‧‧ first lens

111, 211, 311, 411, 511, 611, 711, 811, 911, 1011, 1111

112, 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112 ‧ ‧ like side

120, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120‧‧‧ second lens

121, 221, 321, 421, 521, 621, 721, 821, 921, 1021, 1121

122, 222, 322, 422, 522, 622, 722, 822, 922, 1022, 1122

130, 230, 330, 430, 530, 630, 730, 830, 930, 1030, 1130‧‧‧ third lens

131, 231, 331, 431, 531, 631, 731, 831, 931, 1031, 1131‧‧‧ side

132, 232, 332, 432, 532, 632, 732, 832, 932, 1032, 1132

140, 240, 340, 440, 540, 640, 740, 840, 940, 1040, 1140‧‧‧IR filter

150, 250, 350, 450, 550, 650, 750, 850, 950, 1050, 1150‧‧‧ imaging surface

160, 260, 360, 460, 560, 660, 760, 860, 960, 1060, 1160

1301, 1401‧‧‧‧Image taking device

1310‧‧‧Smartphone

1320‧‧‧ Tablet

1330‧‧‧ Wearable

1402‧‧‧display

1410‧‧‧Reversing Developer

1420‧‧‧Drive Recorder

1430‧‧‧ Surveillance Camera

L3‧‧‧ is the third lens

f‧‧‧ is the focal length of the micro imaging system

f1‧‧‧ is the focal length of the first lens

f2‧‧‧ is the focal length of the second lens

R3‧‧‧ is the curvature radius of the object side of the second lens

R4‧‧‧ is the curvature radius of the image side of the second lens

R5‧‧‧ is the curvature radius of the object side of the third lens

R6‧‧‧ is the curvature radius of the image side of the third lens

V2‧‧‧ is the dispersion coefficient of the second lens

V3‧‧‧ is the dispersion coefficient of the third lens

CT1‧‧‧ is the thickness of the first lens on the optical axis

CT2‧‧‧ is the thickness of the second lens on the optical axis

T12‧‧‧ is the distance between the first lens and the second lens on the optical axis

T23‧‧‧is the distance between the second lens and the third lens on the optical axis

ΣAT‧‧‧ is the sum of the separation distances on the optical axis between all two adjacent lenses in a miniature imaging system

ΣCT‧‧‧ is the total lens thickness of the first lens, the second lens, and the third lens on the optical axis

SD‧‧‧ is the distance on the optical axis between the aperture and the image side of the third lens

TD‧‧‧ is the distance on the optical axis from the object side of the first lens to the image side of the third lens

Yp32, Yp321, Yp322 ‧‧‧ is the vertical distance between the inflection point of the image side of the third lens and the optical axis

Fno‧‧‧ is the aperture value of the miniature imaging system

HFOV ‧‧‧ is half of the maximum viewing angle in a miniature imaging system

ImgH‧‧‧ is the maximum image height of the micro image pickup system

FIG. 1A is a schematic diagram of an image capturing device according to a first embodiment of the present invention.

The first B diagram is an aberration curve diagram of the first embodiment of the present invention.

FIG. 2A is a schematic diagram of an image capturing device according to a second embodiment of the present invention.

The second diagram B is an aberration curve diagram of the second embodiment of the present invention.

FIG. 3A is a schematic diagram of an image capturing device according to a third embodiment of the present invention.

The third diagram B is an aberration curve diagram of the third embodiment of the present invention.

FIG. 4A is a schematic diagram of an image capturing device according to a fourth embodiment of the present invention.

The fourth B diagram is an aberration curve diagram of the fourth embodiment of the present invention.

Fifth A is a schematic diagram of an image capturing device according to a fifth embodiment of the present invention.

A fifth B diagram is an aberration curve diagram of the fifth embodiment of the present invention.

FIG. 6A is a schematic diagram of an image capturing device according to a sixth embodiment of the present invention.

The sixth B diagram is an aberration curve diagram of the sixth embodiment of the present invention.

FIG. 7A is a schematic diagram of an image capturing device according to a seventh embodiment of the present invention.

The seventh diagram B is an aberration curve diagram of the seventh embodiment of the present invention.

FIG. 8A is a schematic diagram of an image capturing device according to an eighth embodiment of the present invention.

The eighth diagram B is an aberration curve diagram of the eighth embodiment of the present invention.

FIG. 9A is a schematic diagram of an image capturing device according to a ninth embodiment of the present invention.

The ninth diagram B is an aberration curve diagram of the ninth embodiment of the present invention.

Fig. 10A is a schematic diagram of an image capturing device according to a tenth embodiment of the present invention.

The tenth B diagram is an aberration curve diagram of the tenth embodiment of the present invention.

FIG. 11A is a schematic diagram of an image capturing device according to an eleventh embodiment of the present invention.

Eleventh B is an aberration curve diagram of the eleventh embodiment of the present invention.

The twelfth figure is a schematic diagram of the parameter Yp32 of the miniature imaging system of the present invention.

Figure 13A is a smart phone equipped with the image capturing device of the present invention.

Figure 13B is a tablet computer schematically equipped with the image capturing device of the present invention.

Fig. 13C is a wearable device schematically showing the image capturing device of the present invention.

Figure 14A is a schematic view of a reversing developing device provided with the image pickup device of the present invention.

Figure 14B is a driving recorder provided with the image capturing device of the present invention.

Figure 14C is a surveillance camera equipped with the image capturing device of the present invention.

The invention provides a miniature image capturing system, which sequentially includes a first lens, a second lens, and a third lens from the object side to the image side.

The first lens can have a negative refractive power, which can help form a negative focus structure to meet a larger angle of the image capture range; its image side can be concave at the near optical axis, so that the first lens has sufficient Divergent ability to help achieve the characteristics of a wide viewing angle.

The second lens has a positive refractive power, which can provide the main convergence ability of the system, balance the aberrations generated by the first lens, and meet the needs of wide-angle and miniaturization; its object side can be convex at the near optical axis, which can effectively share The curvature distribution of the lens surface of the second lens to avoid excessive aberrations and excessive aberrations; its image side can be convex at the near optical axis, which can strengthen the system's convergence ability and balance the main point position to achieve better imaging effect.

The third lens has a negative refractive power, which is beneficial for controlling the back focus of the system to avoid overcorrection of Petzval field; its object and image sides can be aspheric, and its object side can be near the optical axis. It is concave, which can help reduce the angle of light incident on the lens surface to reduce the chance of total reflection; its image side can be convex at the near optical axis, which can control the incident angle of light incident on the imaging surface, so that it has sufficient light Receiving area; its image side may be convex at the near-light axis and there is at least one concave surface from the near-axis to the periphery, which is conducive to correcting the Petzval field to improve the quality of the surrounding image.

The total number of lenses in the micro-imaging system is three. Among them, at least one lens surface of the first lens, the second lens, and the third lens may have at least one inflection point, which can effectively control the shape of the periphery of the lens to adjust the distance between the lens and the light. The angle makes it possible to avoid stray light proliferation.

The thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2. When the miniature imaging system satisfies the following relationship: 0.10 <CT2 / CT1 <2.50, the structural characteristics can be strengthened and the lens can be improved. Pressure resistance to avoid lens deformation due to external forces or environmental factors, and thus have stronger environmental adaptability for use in various application needs; preferably, 0.10 <CT2 / CT1 <1.80; preferably, 0.10 < CT2 / CT1 <1.10.

The distance between the first lens and the second lens on the optical axis is T12, and the focal length of the micro imaging system is f. When the micro imaging system satisfies the following relationship: 0.45 <T12 / f <5.0, the first The distance between one lens and the second lens is to avoid too much space resulting in wasted space or too small space to affect the viewing angle; preferably, 0.60 <T12 / f <3.5.

The third lens has a curvature radius of the object side of R5 and a third lens image has a curvature radius of R6. When the miniature imaging system satisfies the following relationship: | R5 / R6 | <0.70, it can effectively balance the curvature configuration of the third lens surface. To achieve a balance between the field of view angle and the total length; preferably, | R5 / R6 | <0.50.

The focal length of the first lens is f1, and the focal length of the second lens is f2. When the micro-imaging system satisfies the following relationship: -1.30 <f2 / f1 <0.10, it can effectively balance the lens's refractive power configuration, so that it has both a wide viewing angle and Miniaturization characteristics; preferably, -0.75 <f2 / f1 <0.

The total distance between the two adjacent lenses on the optical axis in the miniature imaging system is ΣAT. The total lens thickness of the first lens, the second lens, and the third lens on the optical axis is ΣCT. The system satisfies the following relationship: When 0.20 <ΣAT / ΣCT <0.95, the system space can be effectively used to meet the needs of miniaturization.

The thickness of the first lens on the optical axis is CT1, and the distance between the first lens and the second lens on the optical axis is T12. When the miniature imaging system satisfies the following relationship: 0.10 <T12 / CT1 <3.80, it can be Effectively improve the efficiency of lens space usage to achieve the purpose of miniaturization; preferably, 0.30 <T12 / CT1 <2.50.

The distance between the object side of the first lens and the imaging plane on the optical axis is TL, and the focal length of the micro imaging system is f. When the micro imaging system satisfies the following relationship: 3.80 <TL / f <10.0, it can help Forms the system wide-angle characteristic, and can reduce the amount of difference caused by the shift of light in different wavelength bands on the optical axis.

The curvature radius of the object side curvature of the second lens is R3, and the curvature radius of the image side of the second lens is R4. When the miniature imaging system satisfies the following relationship: 0 <(R3-R4) / (R3 + R4) <3.0, it can be effectively controlled The shape of the lens makes the position of the main point of the system more conducive to forming a wide-angle system; preferably, 1.50 <(R3-R4) / (R3 + R4) <2.50.

The dispersion coefficient of the second lens is V2, and the dispersion coefficient of the third lens is V3. When the micro-imaging system satisfies the following relationship: 2.0 <V2 / V3 <4.0, the chromatic aberration of the system can be corrected so that different wavelengths of light can be imaged on the same image. Face focus.

The distance between the first lens and the second lens on the optical axis is T12, the distance between the second lens and the third lens on the optical axis is T23, and the thickness of the first lens on the optical axis is CT1. The imaging system satisfies the following relationship: When 0.10 <(T12 + T23) / CT1 <2.15, it can help to balance the lens distance configuration to avoid lens interference caused by too short distance, or increase the probability of stray light if the distance is too long; Preferably, 0.20 <(T12 + T23) / CT1 <1.85; preferably, 0.30 <(T12 + T23) / CT1 <1.50.

The curvature radius of the image side of the second lens is R4, and the thickness of the second lens on the optical axis is CT2. When the micro imaging system satisfies the following relationship: -0.50 <R4 / CT2 <0, the refractive power of the second lens can be strengthened. , So that the system has sufficient convergence capabilities to control the total length of the lens.

The focal length of the miniature imaging system is f, and the focal length of the second lens is f2. When the miniature imaging system satisfies the following relationship: 0 <f / f2 <2.0, it can effectively balance the main refractive power of the system and ensure that the system has sufficient vision. Field angle.

The curvature radius of the image side of the second lens is R4, and the curvature radius of the object side of the third lens is R5. When the miniature imaging system satisfies the following relationship: -100 <(R4 + R5) / (R4-R5) <-5.0, it can Balance the spatial relationship between the second lens and the third lens, so as to satisfy manufacturability and have good aberration correction capabilities.

The maximum image height of the micro-imaging system is ImgH, and the focal length of the micro-imaging system is f. When the micro-imaging system satisfies the following relationship: 0.95 <ImgH / f <3.0, the light receiving area of the system can be increased, and the image brightness can be improved. At the same time, the symmetry of the system is improved to improve aberrations.

The micro-imaging system can additionally set an aperture between the first lens and the second lens, the distance between the aperture and the image side of the third lens on the optical axis is SD, and the distance between the object side of the first lens and the image side of the third lens The distance on the optical axis is TD. When the micro-imaging system satisfies the following relationship: 0.10 <SD / TD <0.50, the total length of the system can be controlled, and a large-angle image capture range is also available.

The vertical distance between the inflection point of the image side of the third lens and the optical axis is Yp32 (see Figure 12, if there are multiple inflection points, Yp32 can be the respective reflection of the image side of the third lens (L3) The vertical distance between the bending point and the optical axis is either Yp321 or Yp322). The focal length of the micro-imaging system is f. When the micro-imaging system satisfies the following relationship: 0 <Yp32 / f <1.50, it is beneficial to the peripheral image of the system. Poor correction can effectively reduce coma and distortion.

The focal length of the third lens is f3, and the focal length of the first lens is f1. When the micro imaging system satisfies the following relationship: 0.1 <f3 / f1 <0.95, the functionality of the third lens can be strengthened to facilitate aberration correction.

In the micro-imaging system disclosed in the present invention, the material of the lens may be glass or plastic. If the material of the lens is glass, the degree of freedom in the configuration of the refractive power of the micro-imaging system may be increased. If the material of the lens is plastic, it can effectively reduce Cost of production. In addition, an aspheric surface (ASP) can be provided on the mirror surface, and the aspheric surface can be easily made into a shape other than a spherical surface, and more control variables are obtained to reduce aberrations, thereby reducing the number of lenses used, so the invention can be effectively reduced. The total length of the miniature imaging system.

In the micro-imaging system disclosed in the present invention, at least one stop can be provided, such as an aperture stop, a glare stop, or a field stop, which can help To reduce stray light to improve image quality.

In the miniature image capturing system disclosed in the present invention, the aperture configuration may be front or center. The front aperture means that the aperture is set between the subject and the first lens, and the middle aperture means that the aperture is set between the first lens and the imaging. Between the surfaces, the front aperture can make the exit pupil of the micro imaging system have a longer distance from the imaging surface, making it have a telecentric effect, which can increase the efficiency of the image receiving device such as CCD or CMOS. ; The central aperture helps to expand the field of view of the system, giving the miniature imaging system the advantages of a wide-angle lens.

In the miniature imaging system disclosed in the present invention, if the lens surface is convex and the convex position is not defined, it means that the lens surface can be convex at the near optical axis; if the lens surface is concave and the concave position is not defined, then It means that the lens surface can be concave at the near optical axis. If the refractive power or focal length of the lens does not define its area position, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens at the near optical axis.

In the miniature imaging system disclosed in the present invention, the imaging surface of the miniature imaging system may be a flat surface or a curved surface having any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side. .

The miniature image capturing system disclosed in the present invention can be applied to an optical system for mobile focusing according to requirements, and has the characteristics of excellent aberration correction and good imaging quality. The invention can also be applied in many aspects to electronic devices such as smart electronic products, medical equipment, precision instruments, automotive devices, identification systems, entertainment devices, sports devices, and home intelligent auxiliary systems.

The invention further provides an image capturing device, which includes the aforementioned micro image capturing system and an electronic photosensitive element. The electronic photosensitive element is disposed on the imaging surface of the micro image capturing system, so the image capturing device can be optimized by the design of the micro image capturing system. Imaging effect. Preferably, the micro-imaging system may further include a lens barrel, a Holder Member, or a combination thereof. In addition, the image capturing device may further include an Optical Image Stabilizer device to cooperate with the micro image capturing system to provide better imaging quality.

Referring to FIG. 13A, FIG. 13B, and FIG. 13C, the image capturing device 1301 can be mounted on an electronic device, which includes a smart phone 1310, a tablet computer 1320, or a wearable device 1330. Referring to FIG. 14A, FIG. 14B, and FIG. 14C, the image capturing device 1401 (which can be used with a display screen 1402) can be mounted on an electronic device, including a reverse developing device 1410 and a driving recorder 1420. , Or surveillance camera 1430. The previously-disclosed electronic device is merely an example to illustrate the practical application of the imaging device of the present invention, and does not limit the application range of the imaging device of the present invention. Preferably, the electronic device may further include a control unit, a display unit, a storage unit, a temporary storage unit (RAM), or a combination thereof.

The miniature image capturing system and the image capturing device disclosed in the present invention will be described in detail through the following specific embodiments in conjunction with the accompanying drawings.

"First embodiment"

Please refer to FIG. 1A for the first embodiment of the present invention, and refer to FIG. 1B for the aberration curve of the first embodiment. The imaging device of the first embodiment includes a micro imaging system (not otherwise labeled) and an electronic photosensitive element 160. The micro imaging system includes a first lens 110, an aperture 100, a second lens 120, and The third lens 130, in which the first lens 110 has a negative refractive power and is made of plastic. Its object side 111 is concave at the near optical axis, its image side 112 is concave at the near optical axis, and its object side 111 and The image side 112 is an aspheric surface, and its object side 111 has a point of inflection; the second lens 120 has a positive refractive power, and its material is plastic. Its object side 121 is convex at the near optical axis, and its image side 122 is near. The optical axis is convex, and its object side 121 and image side 122 are aspheric. The third lens 130 has a negative refractive power and is made of plastic. Its object side 131 is concave at the near optical axis, and its image side 132 is at The near optical axis is a convex surface, and its object side surface 131 and image side surface 132 are aspherical surfaces, and its object side surface 131 and image side surface 132 each have two inflection points.

The micro-imaging system further includes an infrared filter element 140 disposed between the third lens 130 and the imaging surface 150. The material is made of glass and does not affect the focal length. The electronic photosensitive element 160 is disposed on the imaging surface 150.

The detailed optical data of the first embodiment is shown in Table 1. The units of the radius of curvature, thickness, and focal length are millimeters, HFOV is defined as half of the maximum viewing angle, and the surface 0-10 sequentially represents the surface from the object side to the image side. The aspherical data is shown in Table 2. k represents the cone coefficient in the aspheric curve equation, and A4-A12 represents the aspheric coefficients of order 4-12 on each surface. In addition, the tables of the following embodiments are schematic diagrams and aberration curves corresponding to the embodiments. The definitions of the data in the tables are the same as the definitions of Tables 1 and 2 of the first embodiment, and will not be repeated here.

The equation of the above aspheric curve is expressed as follows:

Where: X: the point on the aspheric surface that is Y from the optical axis, the relative distance from the tangent plane tangent to the vertex on the aspheric optical axis; Y: the vertical distance between the point on the aspheric curve and the optical axis; R: curvature Radius; k: cone coefficient; Ai: i-th aspheric coefficient.

In the first embodiment, the focal length of the micro imaging system is f, the aperture value of the micro imaging system is Fno, and the half of the maximum viewing angle in the micro imaging system is HFOV. The value is: f = 0.24 (mm), Fno = 3.00, HFOV = 69.0 (degrees).

In the first embodiment, the dispersion coefficient of the second lens 120 is V2, and the dispersion coefficient of the third lens 130 is V3, and the relationship is: V2 / V3 = 2.87.

In the first embodiment, the thickness of the first lens 110 on the optical axis is CT1, and the thickness of the second lens 120 on the optical axis is CT2, and the relationship is: CT2 / CT1 = 0.72.

In the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis is T12, and the thickness of the first lens 110 on the optical axis is CT1, and the relationship is: T12 / CT1 = 1.05.

In the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis is T12, and the focal length of the micro imaging system is f, and the relationship is: T12 / f = 1.77.

In the first embodiment, the distance between the first lens 110 and the second lens 120 on the optical axis is T12, and the distance between the second lens 120 and the third lens 130 on the optical axis is T23. The thickness of the lens 110 on the optical axis is CT1, and the relationship is: (T12 + T23) /CT1=1.14.

In the first embodiment, the curvature radius of the object side 121 of the second lens is R3, and the curvature radius of the image side 122 of the second lens is R4. The relationship is: (R3-R4) / (R3 + R4) = 1.84.

In the first embodiment, the curvature radius of the image side 122 of the second lens is R4, and the curvature radius of the object side 131 of the third lens is R5. The relationship is: (R4 + R5) / (R4-R5) =-5.71.

In the first embodiment, the curvature radius of the image side 122 of the second lens is R4, and the thickness of the second lens 120 on the optical axis is CT2, and the relationship is: R4 / CT2 = -0.43.

In the first embodiment, the curvature radius of the object side surface 131 of the third lens is R5, and the curvature radius of the image side 132 of the third lens is R6, and the relationship is: | R5 / R6 | = 0.31.

In the first embodiment, the focal length of the first lens 110 is f1 and the focal length of the second lens 120 is f2, and the relationship is: f2 / f1 = -0.55.

In the first embodiment, the focal length of the micro imaging system is f, and the focal length of the second lens 120 is f2, and the relationship is: f / f2 = 1.09.

In the first embodiment, the total distance between the two adjacent lenses on the optical axis in the micro-imaging system is ΣAT. The first lens 110, the second lens 120, and the third lens 130 are on the optical axis. The total lens thickness is ΣCT, and the relationship is: ΣAT / ΣCT = 0.51.

In the first embodiment, the distance between the first lens object side surface 111 and the imaging surface 150 on the optical axis is TL, and the focal length of the micro imaging system is f, and the relationship is: TL / f = 7.79.

In the first embodiment, the maximum image height of the micro imaging system is ImgH (ie, half of the diagonal length of the effective sensing area of the electronic photosensitive element 160), and the focal length of the micro imaging system is f, and the relationship is: ImgH / f = 2.09.

In the first embodiment, the distance between the diaphragm 100 and the third lens image side 132 on the optical axis is SD, and the distance between the first lens object side 111 to the third lens image side 132 on the optical axis is TD, the relationship is: SD / TD = 0.40.

In the first embodiment, the vertical distance between the inflection point of the third lens image side 132 and the optical axis is Yp32, and the focal length of the miniature imaging system is f. Because the third lens image side 132 has two inflection points, Therefore, the relations are: Yp32 / f = 0.13 and Yp32 / f = 0.76.

"Second embodiment"

Please refer to FIG. 2A for the second embodiment of the present invention, and refer to FIG. 2B for the aberration curve of the second embodiment. The imaging device of the second embodiment includes a micro imaging system (not otherwise labeled) and an electronic photosensitive element 260. The micro imaging system includes a first lens 210, an aperture 200, a second lens 220, and The third lens 230, wherein the first lens 210 has a negative refractive power and is made of plastic. Its object side 211 is concave at the near optical axis, and its image side 212 is concave at the near optical axis. Its object side 211 and The image side 212 is an aspheric surface, and its object side 211 has a point of inflection; the second lens 220 has a positive refractive power and is made of plastic. Its object side 221 is convex at the near optical axis, and its image side 222 is near The optical axis is convex, and its object side 221 and image side 222 are aspheric. The third lens 230 has a negative refractive power and is made of plastic. Its object side 231 is concave at the near optical axis, and its image side 232 is at The near optical axis is a concave surface, and its object side surface 231 and image side surface 232 are both aspheric surfaces, and its object side surface 231 has two inflection points.

The micro-imaging system further includes an infrared filter element 240 disposed between the third lens 230 and the imaging surface 250. The material is glass and does not affect the focal length. The electronic photosensitive element 260 is disposed on the imaging surface 250.

The detailed optical data of the second embodiment are shown in Table 3, and its aspherical data are shown in Table 4. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The expression of the aspheric curve equation of the second embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Third embodiment"

Please refer to FIG. 3A for the third embodiment of the present invention, and refer to FIG. 3B for the aberration curve of the third embodiment. The imaging device of the third embodiment includes a micro imaging system (not otherwise labeled) and an electronic photosensitive element 360. The micro imaging system includes a first lens 310, an aperture 300, a second lens 320, and The third lens 330, in which the first lens 310 has a negative refractive power and is made of plastic. Its object side 311 is convex at the near optical axis, its image side 312 is concave at the near optical axis, and its object side 311 and The image side 312 is an aspheric surface; the second lens 320 has a positive refractive power and is made of plastic. Its object side 321 is convex at the near optical axis, and its image side 322 is convex at the near optical axis. Its object side 321 Both the image side 322 and the image side 322 are aspherical. The third lens 330 has a negative refractive power. The material is plastic. The object side 331 is concave at the near optical axis. The image side 332 is concave at the near optical axis. Both 331 and the image side 332 are aspheric.

The micro-imaging system further includes an infrared filter element 340 disposed between the third lens 330 and the imaging surface 350. The material is made of glass and does not affect the focal length. The electronic photosensitive element 360 is disposed on the imaging surface 350.

The detailed optical data of the third embodiment is shown in Table 5. The aspherical data is shown in Table 6. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The aspheric curve equation of the third embodiment is expressed in the same manner as the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Fourth embodiment"

Please refer to FIG. 4A for the fourth embodiment of the present invention, and refer to FIG. 4B for the aberration curve of the fourth embodiment. The image capturing device of the fourth embodiment includes a micro image capturing system (not otherwise labeled) and an electronic photosensitive element 460. The micro image capturing system includes a first lens 410, an aperture 400, a second lens 420, and The third lens 430, among which: the first lens 410 has a negative refractive power, the material is plastic, and its object side 411 is convex at the near optical axis, its image side 412 is concave at the near optical axis, and its object side 411 and The image side 412 is aspherical; the second lens 420 has a positive refractive power and is made of plastic. Its object side 421 is convex at the near optical axis, and its image side 422 is convex at the near optical axis. Its object side 421 Both the image side 422 and the image side 422 are aspheric. The third lens 430 has a negative refractive power. The material is plastic. The object side 431 is concave at the near optical axis. The image side 432 is convex at the near optical axis. Both 431 and the image side 432 are aspheric, and the image side 432 has three inflection points.

The micro-imaging system further includes an infrared filter element 440 disposed between the third lens 430 and the imaging surface 450. The material is glass and does not affect the focal length. The electronic photosensitive element 460 is disposed on the imaging surface 450.

The detailed optical data of the fourth embodiment is shown in Table 7, and its aspherical data is shown in Table 8. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The expression of the aspheric curve equation of the fourth embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Fifth embodiment"

Please refer to FIG. 5A for the fifth embodiment of the present invention, and refer to FIG. 5B for the aberration curve of the fifth embodiment. The imaging device of the fifth embodiment includes a micro imaging system (not otherwise labeled) and an electronic photosensitive element 560. The micro imaging system includes a first lens 510, an aperture 500, a second lens 520, and The third lens 530, wherein: the first lens 510 has a negative refractive power, and is made of plastic; its object side 511 is convex at the near optical axis; its image side 512 is concave at the near optical axis; its object side 511 and The image side 512 is an aspheric surface, and its object side 511 has a point of inflection; the second lens 520 has a positive refractive power and is made of plastic. Its object side 521 is convex at the near optical axis, and its image side 522 is near The optical axis is convex. The object side 521 and the image side 522 are aspherical, and the object side 521 and the image side 522 each have an inflection point. The third lens 530 has a negative refractive power and is made of plastic. The object side 531 is concave at the near optical axis, and its image side 532 is convex at the near optical axis. The object side 531 and the image side 532 are aspheric. The object side 531 has an inflection point and the image side 532 Has four inflection points.

The micro-imaging system further includes an infrared filter element 540 disposed between the third lens 530 and the imaging surface 550. The material is glass and does not affect the focal length. The electronic photosensitive element 560 is disposed on the imaging surface 550.

The detailed optical data of the fifth embodiment are shown in Table 9, and its aspherical data are shown in Table 10. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The expression of the aspheric curve equation of the fifth embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Sixth embodiment"

Please refer to FIG. 6A for the sixth embodiment of the present invention, and refer to FIG. 6B for the aberration curve of the sixth embodiment. The imaging device of the sixth embodiment includes a micro imaging system (not otherwise labeled) and an electronic photosensitive element 660. The micro imaging system includes a first lens 610, an aperture 600, a second lens 620, and The third lens 630, among which: the first lens 610 has a negative refractive power, the material is plastic, and its object side 611 is convex at the near optical axis, its image side 612 is concave at the near optical axis, and its object side 611 and The image side 612 is an aspheric surface; the second lens 620 has a positive refractive power and is made of plastic. Its object side 621 is convex at the near optical axis, and its image side 622 is convex at the near optical axis. Its object side 621 Both the image side 622 and the image side 622 are aspherical. The third lens 630 has a negative refractive power. The material is plastic. The object side 631 is concave at the near optical axis. The image side 632 is convex at the near optical axis. Both 631 and the image side 632 are aspheric, the object side 631 has two inflection points, and the image side 632 has one inflection point.

The micro-imaging system further includes an infrared filter element 640 disposed between the third lens 630 and the imaging surface 650. The material is glass and does not affect the focal length. The electronic photosensitive element 660 is disposed on the imaging surface 650.

The detailed optical data of the sixth embodiment is shown in Table 11, and its aspheric data is shown in Table 12. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The aspheric curve equation of the sixth embodiment is expressed in the same manner as the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Seventh embodiment"

Please refer to FIG. 7A for the seventh embodiment of the present invention, and refer to FIG. 7B for the aberration curve of the seventh embodiment. The image capturing device of the seventh embodiment includes a micro image capturing system (not otherwise labeled) and an electronic photosensitive element 760. The micro image capturing system includes a first lens 710, an aperture 700, a second lens 720, and The third lens 730, among which: the first lens 710 has a negative refractive power and is made of plastic. Its object side 711 is concave at the near optical axis, and its image side 712 is concave at the near optical axis. Its object side 711 and The image side 712 is an aspheric surface, and its object side 711 has a point of inflection; the second lens 720 has a positive refractive power, the material is plastic, its object side 721 is convex at the near optical axis, and its image side 722 is near The optical axis is convex, and its object side 721 and image side 722 are aspheric, and its object side 721 has a point of inflection; the third lens 730 has a negative refractive power, its material is plastic, and its object side 731 is in the low beam The axis is concave, and its image side 732 is convex at the near beam axis. Its object side 731 and image side 732 are aspheric. Its object side 731 has one inflection point, and its image side 732 has three inflection points. .

The micro-imaging system further includes an infrared filter element 740 disposed between the third lens 730 and the imaging surface 750. The material is glass and does not affect the focal length. The electronic photosensitive element 760 is disposed on the imaging surface 750.

The detailed optical data of the seventh embodiment is shown in Table 13. The aspherical data is shown in Table 14. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The aspheric curve equation of the seventh embodiment is expressed in the same manner as the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Eighth embodiment"

Please refer to FIG. 8A for the eighth embodiment of the present invention, and refer to FIG. 8B for the aberration curve of the eighth embodiment. The image capturing device of the eighth embodiment includes a micro image capturing system (not otherwise labeled) and an electronic photosensitive element 860. The micro image capturing system includes a first lens 810, an aperture 800, a second lens 820, and The third lens 830, in which the first lens 810 has a positive refractive power and is made of plastic. Its object side 811 is concave at the near optical axis, its image side 812 is convex at the near optical axis, and its object side 811 and The image side 812 is an aspheric surface, and its object side 811 and the image side 812 each have a point of inflection; the second lens 820 has a positive refractive power, the material is plastic, and its object side 821 is convex at the near beam axis. Its image side 822 is convex at the near optical axis, its object side 821 and image side 822 are aspheric, and its object side 821 has a point of inflection; the third lens 830 has a negative refractive power, and its material is plastic. The object side surface 831 is concave at the near optical axis, and its image side 832 is convex at the near optical axis. The object side 831 and the image side 832 are aspheric. The object side 831 has an inflection point and the image side 832. Has three inflection points.

The micro-imaging system further includes an infrared filter element 840 disposed between the third lens 830 and the imaging surface 850. The material is made of glass and does not affect the focal length. The electronic photosensitive element 860 is disposed on the imaging surface 850.

The detailed optical data of the eighth embodiment is shown in Table 15. The aspherical data is shown in Table 16. The unit of the radius of curvature, thickness, and focal length is millimeters, and HFOV is defined as half of the maximum viewing angle.

The expression of the aspheric curve equation of the eighth embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Ninth Embodiment"

Please refer to FIG. 9A for the ninth embodiment of the present invention, and refer to FIG. 9B for the aberration curve of the ninth embodiment. The image capturing device of the ninth embodiment includes a micro image capturing system (not otherwise labeled) and an electronic photosensitive element 960. The micro image capturing system includes a first lens 910, an aperture 900, a second lens 920, and The third lens 930, wherein: the first lens 910 has a negative refractive power, the material is plastic, the object side 911 is a plane, the image side 912 is concave at the near optical axis, and the image side 912 is an aspheric surface; The lens 920 has a positive refractive power and is made of plastic. Its object side 921 is convex at the near optical axis, its image side 922 is convex at the near optical axis, and its object side 921 and image side 922 are aspheric. The three lenses 930 have a negative refractive power. The material is plastic. The object side 931 is concave at the near optical axis. The image side 932 is convex at the near optical axis. The object side 931 and the image side 932 are aspheric. The object side 931 has two inflection points, and the image side 932 has one inflection point.

The micro-imaging system further includes an infrared filter element 940 placed between the third lens 930 and the imaging surface 950. The material is made of glass and does not affect the focal length. The electronic photosensitive element 960 is disposed on the imaging surface 950.

The detailed optical data of the ninth embodiment is shown in Table 17, and its aspherical data is shown in Table 18. The unit of curvature radius, thickness and focal length is millimeter, and HFOV is defined as half of the maximum viewing angle.

The aspheric curve equation of the ninth embodiment is expressed in the same manner as the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

Tenth Embodiment

Please refer to FIG. 10A for the tenth embodiment of the present invention, and refer to FIG. 10B for the aberration curve of the tenth embodiment. The imaging device of the tenth embodiment includes a micro imaging system (not otherwise labeled) and an electronic photosensitive element 1060. The micro imaging system includes a first lens 1010, an aperture 1000, a second lens 1020, and The third lens 1030, wherein: the first lens 1010 has a negative refractive power, the material is plastic, the object side 1011 is a plane, the image side 1012 is concave at the near optical axis, and the image side 1012 is an aspheric surface; The lens 1020 has a positive refractive power and is made of plastic. Its object side 1021 is convex at the near optical axis, its image side 1022 is convex at the near optical axis, and its object side 1021 and image side 1022 are aspheric. The three lenses 1030 have negative refractive power. The material is plastic. Its object side 1031 is concave at the near optical axis. Its image side 1032 is convex at the near optical axis. Its object side 1031 and image side 1032 are aspheric. The object side 1031 and the image side 1032 each have two inflection points.

The micro-imaging system further includes an infrared filter element 1040 disposed between the third lens 1030 and the imaging surface 1050. The material is glass and does not affect the focal length; the electronic photosensitive element 1060 is disposed on the imaging surface 1050.

The detailed optical data of the tenth embodiment is shown in Table 19, and its aspherical data is shown in Table 20. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The expression of the aspheric curve equation of the tenth embodiment is the same as that of the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

"Eleventh embodiment"

Please refer to FIG. 11A for the eleventh embodiment of the present invention, and refer to FIG. 11B for the aberration curve of the eleventh embodiment. The imaging device of the eleventh embodiment includes a micro imaging system (not labeled) and an electronic photosensitive element 1160. The micro imaging system includes a first lens 1110, an aperture 1100, and a second lens 1120 in this order from the object side to the image side. And the third lens 1130, in which the first lens 1110 has a negative refractive power and is made of plastic, and its object side 1111 is convex at the near optical axis, its image side 1112 is concave at the near optical axis, and its object side 1111 Both the image side 1112 and the image side 1112 are aspherical. The object side 1111 has a point of inflection. The second lens 1120 has a positive refractive power. The material is plastic. The object side 1121 is convex at the near optical axis. The image side 1122 is The near optical axis is convex, and its object side 1121 and image side 1122 are aspheric, and its object side 1121 has a inflection point; the third lens 1130 has a negative refractive power, and its material is plastic, and its object side 1131 is near The optical axis is concave, the image side 1132 is convex at the near optical axis, the object side 1131 and the image side 1132 are aspheric, and the image side 1132 has three inflection points.

The micro-imaging system further includes an infrared filter element 1140 placed between the third lens 1130 and the imaging surface 1150. The material is glass and does not affect the focal length. The electronic photosensitive element 1160 is disposed on the imaging surface 1150.

The detailed optical data of the eleventh embodiment is shown in Table 21. The aspherical data is shown in Table 22. The units of the radius of curvature, thickness, and focal length are millimeters, and HFOV is defined as half of the maximum viewing angle.

The eleventh embodiment is expressed as an aspheric curve equation in the form of the first embodiment. In addition, the parameters of each relational expression are as explained in the first embodiment, but the values of each relational expression are listed in the following table.

The above tables show different numerical change tables of the micro-imaging system in the embodiments disclosed by the present invention. However, the numerical changes of the various embodiments of the present invention are experimental results. Even if different values are used, products of the same structure should still belong to The scope of protection disclosed by the present invention is therefore described in the above description and the drawings are only exemplary, and are not intended to limit the scope of patent application disclosed by the present invention.

Claims (29)

    A miniature image acquisition system includes, from an object side to an image side, a first lens having a negative refractive power, a second lens having a positive refractive power, and a third lens having a negative refractive power and an object side. It is concave at the near optical axis; wherein the total number of lenses of the micro imaging system is three, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, The distance between the first lens and the second lens on the optical axis is T12, the focal length of the miniature imaging system is f, the radius of curvature of the object side curvature of the third lens is R5, and the radius of curvature of the image side of the third lens is For R6, the following relationship is satisfied: 0.10 <CT2 / CT1 <1.80; 0.45 <T12 / f <5.0; | R5 / R6 | <0.70.         According to the miniature image capturing system described in item 1 of the scope of patent application, the object side and the image side of the third lens are aspherical, and the image side of the third lens is convex at the near optical axis.         The miniature imaging system according to item 1 of the scope of patent application, wherein the object side and the image side of the second lens are convex at the near optical axis.         The miniature imaging system according to item 1 of the scope of patent application, wherein the image side of the third lens is convex at the near optical axis, and there is at least one concave surface from the near axis to the periphery.         According to the miniature image capturing system described in the first item of the patent application scope, the dispersion coefficient of the second lens is V2, and the dispersion coefficient of the third lens is V3, which satisfies the following relationship: 2.0 <V2 / V3 <4.0.         The miniature imaging system according to item 1 of the scope of patent application, wherein the distance between the first lens and the second lens on the optical axis is T12, the focal length of the miniature imaging system is f, and the third The curvature radius of the object side of the lens is R5, and the curvature radius of the image side of the third lens is R6, which satisfies the following relationship: 0.60 <T12 / f <3.5; | R5 / R6 | <0.50.         The miniature imaging system according to item 1 of the scope of patent application, wherein the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens is between the The distance on the optical axis is T23, and the thickness of the first lens on the optical axis is CT1, which satisfies the following relationship: 0.30 <(T12 + T23) / CT1 <1.50.         The miniature imaging system according to item 1 of the scope of patent application, wherein the distance between the object side of the first lens and an imaging surface on the optical axis is TL, the focal length of the miniature imaging system is f, and the miniature The total distance between the two adjacent lenses in the imaging system on the optical axis is ΣAT. The total lens thickness of the first lens, the second lens, and the third lens on the optical axis is ΣCT. The system satisfies the following relations: 3.80 <TL / f <10.0; 0.20 <ΣAT / ΣCT <0.95.         According to the miniature image capturing system described in item 1 of the patent application scope, wherein the curvature radius of the image side of the second lens is R4, and the thickness of the second lens on the optical axis is CT2, which satisfies the following relationship: -0.50 < R4 / CT2 <0.         An image capturing device includes a miniature image capturing system and an electronic photosensitive element as described in item 1 of the scope of patent application.         An electronic device includes an image capturing device as described in item 10 of the scope of patent application.         A miniature image acquisition system includes, in order from the object side to the image side, a first lens, a second lens with a positive refractive power, and a third lens with a negative refractive power, the object side of which is near the optical axis. Is a concave surface; wherein the total number of lenses of the micro-imaging system is three; the thickness of the first lens on the optical axis is CT1; the thickness of the second lens on the optical axis is CT2; The focal length is f1, the focal length of the second lens is f2, and the total distance between the two adjacent lenses in the miniature imaging system on the optical axis is ΣAT. The first lens, the second lens, and the first lens The total lens thickness of the three lenses on the optical axis is ΣCT, which satisfies the following relations: 0.10 <CT2 / CT1 <1.10; -1.30 <f2 / f1 <0.10; 0.20 <ΣAT / ΣCT <0.95.         The miniature imaging system according to item 12 of the scope of patent application, wherein the image side of the third lens is convex at the near optical axis.         The miniature imaging system according to item 12 of the patent application, wherein at least one lens surface of the third lens has at least one inflection point, the focal length of the miniature imaging system is f, and the focal length of the second lens is f2 , Which satisfies the following relationship: 0 <f / f2 <2.0.         According to the miniature image capturing system described in item 12 of the patent application scope, wherein the focal length of the first lens is f1 and the focal length of the second lens is f2, the following relationship is satisfied: -0.75 <f2 / f1 <0.         According to the miniature image capturing system described in item 12 of the patent application scope, wherein the curvature radius of the object side curvature of the second lens is R3, and the curvature radius of the image side of the second lens is R4, which satisfies the following relationship: 1.50 <(R3-R4 ) / (R3 + R4) <2.50.         The miniature imaging system according to item 12 of the scope of patent application, wherein the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens is between the The distance on the optical axis is T23, and the thickness of the first lens on the optical axis is CT1, which satisfies the following relationship: 0.10 <(T12 + T23) / CT1 <2.15.         According to the miniature image capturing system described in item 12 of the patent application scope, the curvature radius of the image side of the second lens is R4, and the curvature radius of the object side of the third lens is R5, which satisfies the following relationship: -100 <(R4 + R5) / (R4-R5) <-5.0.         According to the miniature image capturing system described in item 12 of the patent application scope, the dispersion coefficient of the second lens is V2, and the dispersion coefficient of the third lens is V3, which satisfies the following relationship: 2.0 <V2 / V3 <4.0.         The miniature imaging system according to item 12 of the patent application scope, wherein the maximum image height of the miniature imaging system is ImgH, and the focal length of the miniature imaging system is f, which satisfies the following relationship: 0.95 <ImgH / f < 3.0.         The miniature imaging system according to item 12 of the patent application scope, wherein the miniature imaging system further sets an aperture between the first lens and the second lens, and between the aperture and the image side of the third lens. The distance on the optical axis is SD, and the distance between the object side of the first lens and the image side of the third lens on the optical axis is TD, which satisfies the following relationship: 0.10 <SD / TD <0.50.         A miniature image capturing system includes, in order from the object side to the image side, a first lens, a second lens having a positive refractive power, and a third lens having a negative refractive power. Among these, The total number of lenses is three. The thickness of the first lens on the optical axis is CT1. The thickness of the second lens on the optical axis is CT2. The first lens and the second lens are on the optical axis. The distance is T12, the distance between the object side of the first lens and an imaging surface on the optical axis is TL, the focal length of the micro-imaging system is f, and the radius of curvature of the object side of the second lens is R3. The curvature radius of the two lens image sides is R4, which satisfies the following relations: 0.10 <CT2 / CT1 <2.50; 0.10 <T12 / CT1 <3.80; 3.80 <TL / f <10.0; 0 <(R3-R4) / (R3 + R4) <3.0.         The miniature imaging system according to item 22 of the scope of patent application, wherein the object side of the third lens is concave at the near optical axis.         The miniature imaging system according to item 22 of the scope of patent application, wherein the first lens has a negative refractive power, the image side of the second lens is convex, and the inflection point of the image side of the third lens is perpendicular to the optical axis The distance is Yp32, and the focal length of the miniature imaging system is f, which satisfies the following relationship: 0 <Yp32 / f <1.50.         According to the miniature image capturing system described in item 22 of the scope of patent application, wherein the focal length of the third lens is f3 and the focal length of the first lens is f1, the following relationship is satisfied: 0.1 <f3 / f1 <0.95.         The miniature imaging system according to item 22 of the scope of patent application, wherein the distance between the first lens and the second lens on the optical axis is T12, and the thickness of the first lens on the optical axis is CT1 , Which satisfies the following relationship: 0.30 <T12 / CT1 <2.50.         The miniature imaging system according to item 22 of the scope of patent application, wherein the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens is between the The distance on the optical axis is T23, and the thickness of the first lens on the optical axis is CT1, which satisfies the following relationship: 0.20 <(T12 + T23) / CT1 <1.85.         According to the miniature image capturing system described in item 22 of the scope of patent application, the object side curvature radius of the third lens is R5, and the image lens side curvature radius of the third lens is R6, which satisfies the following relationship: | R5 / R6 | < 0.70.         According to the miniature image capturing system described in item 22 of the patent application scope, the dispersion coefficient of the second lens is V2, and the dispersion coefficient of the third lens is V3, which satisfies the following relationship: 2.0 <V2 / V3 <4.0.